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The missing or altered X chromosome of Turner syndrome causes errors during fetal development and other developmental problems after birth â short stature, ovarian failure and learning disabilities. Physical characteristics and health complications that arise from the chromosomal error vary greatly.
An extra chromosome number 21 results in Down Syndrome. A missing sex chromosome results in an X0 offspring who has Turner's syndrome. An extra X chromosome results in Klinefelters syndrome (XXY). 7. How many chromosomes are present in the abnormal karyotype: ________. 8. What is the diploid chromosome number for this karyotype: _________. 9.